diff --git a/rules.mk b/rules.mk
index b6fdbf26a..2e0cfbd0d 100644
--- a/rules.mk
+++ b/rules.mk
@@ -10,6 +10,8 @@ MODULE_RUST_CRATE_TYPES := proc-macro
 MODULE_SRCS := $(LOCAL_DIR)/src/lib.rs
 MODULE_RUST_EDITION := 2018
 MODULE_LIBRARY_DEPS := \
-	
+
+MODULE_RUSTFLAGS += \
+	--cfg 'trusty' \
 
 include make/library.mk